Insulator.



PATENTED JULY 10, 1906.

M. P. BAKER.

INSULATOR.

APPLICATION 3mm) JULY 25. 1905.

wifncoa a UNITED srarps PATENT OFFICE.

MELVIN F. BAKER, OF LEWISTQWN, MONTANA.

INSULATOR- Specification of Letters Patent.

Patented July 10, 1906.

Application filed July 25, 1905- Serial No, 271,249-

cured to the usual cross-arm.

The main object of the present invention is the production of aninsulator constructed in sections, whereby to accommodate wires ofvarying gage, the securing means for the sections being housed withinthe supportingstem.

The details of structure of the present invention will'be-clearl'ydescribed in the following specification, reference bein had to theaccompanying drawings, in whi(i1 Figure 1 is a view in side elevation ofan in sulator constructed in accordance with my invention. Fig. 2 is afront elevation of the same. Fig. 3 1s a vertical central section of thesame. Fig. 4 is a top plan of the same. Fig. 5 is aclan or face view ofthe base-block of the insulator roper.

Referring to t is drawings, it will be noted that my improved insulatorisadapted to support two arallel Wires, though it is to be understood tat it may be readily arranged to receive one or more wires.

In the construction shown my improved insulator comprises a stem 1,preferably of wood or other suitable material, having a rear wall 2 anda head or sup orting block" 3, arranged at right angles to t e rear walland designed to support the insulator proper. The stem 1 is providedwith side walls 4, projecting at rig t angles from the rear wall 2 andinclining from the edge of said-support ing-block 3 toward andpractically coincident with the faceof the rear wall at the lower end 5of the stem. The stem described, as will be noted, is ractically hollowfor the greater portion of its length, having one edge vertical and theopposite edge inclined, providng practically a wedge-shaped stem.

e,1nsulator roper is made in two sec ,CQIODS, a lower or ase section 5and anup. er or head section-6, both of which are equal in sectionaldimensions to the size of the block 3 of the stem and are preferablyconstructed of glass, porcelain, or other suitable non-conductingmaterial. The upper face of the base 5 and the lower face of the head 6are formed with parallel -arranged V-shaped grooves 7 and 8,respectively, designed to register with each other when the sections arein operative position, and thereby provide openings, diamond-shaped intransverse section, to receive wires 9.

The sections of the insulator proper are supported on the stem throughthe medium of a bolt 10, passed centrally and vertically through theblock 3 of the stem and through vertically-alined openings formed in thebase 5 and head 6, receivin beyond the head-section a nut 11, by whic lthe parts are secured together. signed to rest snugly against the lowerface of the stem-block 3 within the plane of the side walls 4, wherebysaid bolt is effectively protected and yet readily accessible whendesired for removal.

Owin to the shape of thewire-receiving openings, it will be apparentthat the clam ing action of the nut 11 will securely bind t e wireswithin said opening, thereby reventing longitudinal or other movement 0the Wires.

The insulator may be supported from the usual cross-arm by drivin thestem 1 into suitably-formed openings t erein, the Wedging actioninsuring the positive retention of the insulator in place.

In the use of the insulator for two parallel wires it will be noted thatthe securing-bolt 10 is located intermediate said wires thereb securelybinding'both by the use of a sing e bolt. As theinsulator-sections aresecured to the stem. through the medium of a sin 1e centrally-arrangedbolt, it is obvious that t e sections as a whole may be swung on thebolt as a pivot to vary the direction of the supported wires at willwithout affecting or The head 12 of the bolt is de changing in the leastthe connection between the stem and cross-arm.

Havin thus fully described my invention, what I claim as new, and desireto secure by Letters Patent, is 1. An insulator like stem, said stembeing 0 on on one side and wedge-shaped in lpngitu inal section, in-

comprising a hollow boxsulating-sections arranged to clamp the wire Itending verticelly alnci centrally through the between them, and a.single connection besections, and a nut engaging the bolt beyond I0tween the stem and insulator-sections, said the sections. connectionserving as a pivot forthe sections.

2. Aninsulator comprising a hollow wedge- I MELVIN BAKER shaped stem,insulstor-sections formed With In presence of registerinQ-V-shapedrecesses to receive a EDWARD SHooK,

Wire, a bolt housed Within the stem and ex- SAMUEL DQMCCOLLUM.

